Use of NeemPro ® , a neem product to control maize weevil Sitophilus zeamais (Motsch.) (Coleoptera: Curculionidae) on three maize varieties in Cameroon

Table 2 Corrected mortality of Sitophilus zeamais exposed to NeemPro^® after 1, 3, 7 and 14 days on three maize varieties under laboratory conditions

Maize variety/content (g/kg)	% Mortality (mean ± SE)—exposure period (days)
Maize variety/content (g/kg)	1	3	7	14
CLH103
0	0 ± 0	0 ± 0^c	0 ± 0^b	0 ± 0^c
0.75	0 ± 0	5 ± 2^bc	32.5 ± 13.92^ab	42.5 ± 9.24^b
1.5	0 ± 0	30 ± 13.69^abc	52.5 ± 22.59^ab	92.5 ± 4.33^a
3	0 ± 0	30 ± 3.54^ab	71.25 ± 15.73^a	92.5 ± 4.33^a
6	2.5 ± 1.44	43.75 ± 11.43^a	76.25 ± 12.81^a	100 ± 0^a
F value	3 ns	4.83*	4.36*	75.94***
CMS8501
0	0 ± 0	0 ± 0^b	0 ± 0^d	0 ± 0^c
0.75	0 ± 0	3.75 ± 2.39^b	19.73 ± 4.11^c	17.73 ± 6.48^bc
1.5	0 ± 0	7.5 ± 3.23^ab	56.78 ± 8.04^b	57.95 ± 20.73^ab
3	0 ± 0	17.5 ± 5.95^ab	77.80 ± 12.37^ab	87.65 ± 6.15^a
6	1.25 ± 1.25	38.75 ± 11.43^a	93.1 ± 4.28^a	94.55 ± 2.42^a
F value	1 ns	6.63**	32.99***	16.28***
SHABA
0	0 ± 0	0 ± 0^c	0 ± 0^b	0 ± 0^c
0.75	0 ± 0	3.75 ± 2.39^bc	10 ± 4.56^b	10.45 ± 3.56^bc
1.5	0 ± 0	8.75 ± 1.25^ab	24.25 ± 13.75^ab	26.20 ± 5.18^b
3	0 ± 0	12.5 ± 3.23^ab	55 ± 9.35^a	67.58 ± 11.92^a
6	0 ± 0	25 ± 7.36^a	63.75 ± 12.64^a	89.13 ± 6.32^a
F value	–	6.47**	8.4***	33.18***

Means in the same column for the same maize variety, followed by the same letter do not differ significantly at P = 0.05 (Tukey’s test); Number of replicates: 4; * P < 0.05; ** P < 0.01; *** P < 0.001; F value: a ratio of two variances—the “between group” variance and the “within-group” variance